Frost Bank app on my Series 8 Apple Watch is not working

It would be remarkable for a banking app to work on an Apple Watch but I assue you checked that with the bank.

The situation yo have is a spinning logo.

I suggest performing a forced restart. Steps needed are found in the Apple Support article: Restart your Apple Watch - Apple Support

i.e. press and hold both the side button and Digital Crown for at least 10 seconds, then release both buttons when you see the Apple logo.

If you've completed that troubleshooting and the issue is still not resolved, Contact Support.

Click here > Contact - Official Apple Support

or phone numbers

Click here > Contact Apple for support and service - Apple Support

No it appears to be broken

I repeat

If you completed that troubleshooting and the problem is not resolved then reach out to apple support Click here > Contact - Official Apple Support  or phone numbers Click here > and or Genius Bar Reservation and Apple Support Options - Apple

See my first sentence. Does the bank think that their app works with apple watch?

If the spinner remains after Forced restart, see my last paragraph. .